CREATININE, URINE, 24 HOUR

Test Code

UCRE (OE), CR24U (LAB)

CPT Codes
82570

Preferred Specimen

24 Hour Urine Container without preservative

Patient Preparation
Discard first morning urine on day of collection and note the time. Collect all urine voided during the next 24 hours. Refrigerate the urine during the entire collection. See patient collection instructions link below.

Minimum Volume

4 mL aliquot (8 mL aliquot)

Instructions

Mix the specimen well and measure the 24-hour volume
Record the total volume
Aliquot (pour off) 20 mL of urine into a separate plastice screw-cap container
Refrigerate if not tested immediately

Transport Container

Transfer tube (note total volume)

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 4 days

Methodology
Enzymatic rate

Setup Schedule

M, T, W, Th, F, Sa, Su

As received; STAT testing is available

Report Available

Within 24 hours of receipt

Reference Range

Age in Years	Male Reference Range	Female Reference Range
3-8	140-700 mg/24hr	140-700 mg/24hr
9-12	300-1300 mg/24hr	300-1300 mg/24hr
13-17	500-2300 mg/24hr	400-1600 mg/24hr
18-50	1000-2500 mg/24hr	700-1600 mg/24hr
51-80	800-2100 mg/24hr	500-1400 mg/24hr
81 and older	600-2000 mg/24hr	400-1300 mg/24hr

Clinical Significance

The daily urine excretion of creatinine shows minimal fluctuation, therefore, creatinine excretion is useful in determining whether 24-hour urine specimens for other analytes (e.g., protein) have been completely and accurately collected

Performing Laboratory
Alverno Central Lab

Additional Information
24 Hour Urine Collection Instructions

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.